Patent US3965833A successfully refreshed from Google Patents.
US3965833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide-fastener stringer with warp-knit support tapes
Assignee: Opti Holding AG
•
Filing: 1974-10-03
•
Granted: 1976-06-29
•
Expires: 1994-10-03
Abstract
Abstract A slide-fastener stringer foundation is formed of support tapes which are warp-knit. Two different types of weft filaments are used, one being textured and of limited shrinkability and the other being highly shrinkable. The tape so knitted is heat-shrunk so as to cause the shrinkable yarn to form the textured yarn into a mass of bulges or loops on the surface of the tape, thereby imparting to this tape a very smooth texture.
Inventors
- 👤 Alfons Frohlich
- 👤 Marie-Luise Cappel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:09
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/24; A44B19/34; A44B19/343; Y; Y10; Y10T; Y10T24/00; Y10T24/25; Y10T24/2518; Y10T24/2521; Y10T24/2527
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
A method of making a slide-fastener stringer tape comprising the steps of: continuously forming a substantially nonstretchable knit warp of only smooth synthetic yarns; continuously laying into said warp textured synthetic weft yarns and highly shrinkable smooth synthetic weft yarns; and thereafter shrinking said highly shrinkable yarns transversely of the tape to form said textured yarns into a mass of bulges on at least one face of said tape within meshes formed by the smooth yarns.
Claim 2
Independent Claim
76 words
A method of making a slide-fastener stringer tape comprising the steps of: continuously forming a substantially nonstretchable knit warp of only smooth synthetic yarns; continuously laying into said warp textured synthetic weft yarns and highly shrinkable smooth synthetic weft yarns; and thereafter shrinking said highly shrinkable yarns transversely of the tape to form said textured yarns into a mass of bulges on at least one face of said tape within meshes formed by the smooth yarns.
Claim 3
Dependent Claim
37 words
The method defined in claim 1, further comprising the step of leaving along an edge of said tape a series of stitch-free holes and sewing a coupling element to said edge with stitching passing through said holes.
Claim 4
Dependent Claim
21 words
The method defined in claim 2 wherein said highly shrinkable yarns are shrunk after said element is sewn to said edge.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |